Display device, display unit, and conference system

Abstract

A display device includes a touch panel having an operation surface, an electrostatic speaker provided on an opposite side of the operation surface of the touch panel, and a display panel provided on an opposite side of the electrostatic speaker with respect to the touch panel. The electrostatic speaker has a first conductive layer, a second conductive layer facing the first conductive layer, and a dielectric interposed between the first conductive layer and the second conductive layer.

1 . A display device comprising:
 a touch panel having an operation surface;   an electrostatic speaker provided on an opposite side of the operation surface and having a first conductive layer, a second conductive layer facing the first conductive layer, and a dielectric interposed between the first conductive layer and the second conductive layer; and   a display panel provided on an opposite side of the electrostatic speaker with respect to the touch panel,   wherein the touch panel is a capacitive touch panel; and   the first conductive layer and second conductive layer are contactable with each other and constitute a resistive touch panel.   
     
     
         2 . The display device according to  claim 1 , further comprising a vibration substrate disposed between the electrostatic speaker and the display panel. 
     
     
         3 - 4 . (canceled) 
     
     
         5 . A display unit comprising:
 the display device according to  claim 1 ;   a voice signal producing device connected to the first conductive layer and the second conductive layer; and   an image signal producing device connected to the display panel.   
     
     
         6 . A conference system comprising:
 the display unit according to  claim 5 ; and   a telecommunications device connected to the voice signal producing device and the image signal producing device.